For as little as $30 you can get a great wok that will last for years. Choose a carbon-steel wok with a flat bottom—they’re light, easy to hold and move, and the flat bottom allows them to sit directly on the burner of your stove, so they get hot enough. Avoid nonstick woks—most nonstick cookware should not be used over high heat, and many wok stir-fries require high heat for the best results.